This treatment documents Pristaulacus erythrocephalus using a male from Songkhla and a female from Khao Pu-Khao Ya National Park, Trang. The large wasp has a reddish-orange head and thorax with black posterior structures and diagnostic morphology. A Thai barcode differed 18.51% from its nearest Aulacidae sequence in BOLD. The record supports a wider Southeast Asian distribution; the host is unknown.
Key findings
- Thai material includes male and female specimens from Songkhla and Trang. • Morphology and a barcode support the treatment. • The species is regionally distributed but its host is unknown.
Why this matters globally
Sex-specific and molecular data improve species delimitation and regional monitoring where insect records remain incomplete.
Thai researcher contribution
A Chulalongkorn University researcher helps analyze Thai material and connect it to global barcode resources.
Limitations to consider
Only two Thai specimens are reported, and one genetic-distance comparison was incongruent with the phylogenetic tree, calling for more loci and samples.